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Alpha Ceph

The Alpha Ceph is the final boss of Crysis 3, and it may be the toughest boss fight in the entire game.

The first thing you should do is get behind cover and use the Tactical Visor to tag the Alpha Ceph's three weak spots. It will also be useful to mark the weapons in the area to locate them quickly.

If you don't have a Ceph Weapon from earlier, you'll have to locate and pick one up from the surrounding area. The X-Pac Mortar and Reaper Cannon are the best ones for the job. Use the Ceph Batteries in the area to supercharge the Nanosuit and Ceph weapon you are currently holding. They are the red containers that will have a battery icon above them when looking through the Tactical Visor. Damage dealt will be maximized, and damage received will be almost completely negated! Start blasting away at one of his three weak spots. The best time to hit them is when they glow orange-red. When your suit comes down from the charge, quickly get behind cover and use Armor mode. Hopefully you will take it down before the charge ends.

Once enough damage is dealt, the Alpha Ceph will bring you in close. Mash which ever button appears on screen to get thrown back to the ground. A few Ceph Grunts will come in to back up the Alpha Ceph while he hides for a minute or so. Switch to a normal weapon from around the area and clear out the grunts. Hacking the sentry guns nearby will help out quite a bit, as well.

After a short amount of time the Alpha Ceph will come back to the fight. Find another Ceph Weapon and Ceph Battery to power back up. Attack the weak spots just like last time, and remember to use the Tactical Visor to quickly locate objects in the area. The Alpha Ceph may take this opportunity to use an extremely powerful attack. The suit will try to warn you by saying “Incoming Strike,” so be prepared! If this strike hits you, you will instantly die, even if supercharged and playing on easy difficulty. Don't try hiding behind the boulders in the area, the attack will break right through them. The best thing to do is hide behind alcoves or any substantial cover you can find.

Take out a second weak spot, and the Alpha Ceph will bring you face to face once more. Mash the button to land back on the ground and send the Alpha Ceph into hiding once more. More Ceph Grunts and even Ceph Devastators will come in as reinforcements. Eliminate them with any weapons in the area, and don't forget about hacking sentry turrets. When the Alpha Ceph comes back, dodge the strike attack and hit his final weak spot with a supercharged suit and weapon.

When all three weak spots are hit, a short cut scene will play. Hit the Alpha Ceph with the final arrow to kill it. Another short scene will play to end the mission, and The True Measure of a Hero achievement / trophy will unlock.